Agreed. I would actually be surprised if only a single lab had tried to reproduce a key result.

There may well be other labs which tried, and failed, to reproduce the original author's findings. In any event, it is unlikely we would know, as failure is unfortunately rarely publicized in academia (especially so when such failure is commonly dismissed out of hand for reasons such as a "lack of expertise").

I personally think the work this replication work is incredibly important and should absolutely be a key priority for funding institutions.